#my-slider{
position: relative;
width: 790px;
}
.slider_list ul{
list-style-type: none;
position: relative;
padding: 0;
margin: 0;
}

.slider_list_item,
.slider_list_item_selected{
position: absolute;
transition: opacity 1s;
opacity: 0;
text-align: center;
}
.slider_list_item_selected{
transition: opacity 1s;
opacity: 1;
}

.slide-list__control{
position: relative;
display: table;
background-color: rgba(255, 255, 255, 0.5);
padding: 5px;
border-radius: 12px;
bottom: 30px;
margin: auto;
}

.slide-list__next,
.slide-list__previous{
display: inline-block;
position: absolute;
top: 50%;
margin-top: -25px;
width: 30px;
height:50px;
text-align: center;
font-size: 24px;
line-height: 50px;
overflow: hidden;
border: none;
background: transparent;
color: white;
background: rgba(0,0,0,0.2);
cursor: pointer;
opacity: 0;
transition: opacity .5s;
}

.slider_list__previous {
left: 0;
}

.slider_list__next {
right: 0;
}

#my-slider:hover .slider_list__previous {
opacity: 1;
}


#my-slider:hover .slider_list__next {
opacity: 1;
}

.slider_list__previous:after {
content: '<';
}

.slider_list__next:after {
content: '>';
}
  
.slider_list__control_buttons,
.slider_list__control_buttons_selected{
display: inline-block;
width: 15px;
height: 15px;
border-radius: 50%;
margin: 0 5px;
background-color: white;
cursor: pointer;
}

.slider_list__control_buttons_selected {
background-color: red;
}